from tkinter import *

print('Введите начальную координату Х:')
X= int(input()) 
print('Bведите начальную координату Ү:')
Y= int(input())
print('Введите коэффициент увеличения N:')
N= int(input())

coords = [0,0,10,0,10,10,20,10,20,20,0,201]

if N == 0 and X<=0 and X<=500 and Y>=0 and Y<=500:
    pass
else:
    if N > 0 and 0*N+X>=0 and 0*N+Y>=0 and 20*N+X<=500 and 20*N+Y<=500:
        pass
    else:
        if N < 0 and 20*N+X>=0 and 20*N+Y>=0 and 0*N+X<=500 and 0*N+Y<=500:
            pass
        else:
            print('Размер фигуры превышает максимальный размер поля')
            exit ()

root = Tk()
root.title("ИТ марафон")
root.geometry("500x500")

canvas = Canvas(bg="white", width=500, height=500)
canvas.pack (anchor=CENTER, expand=1)

canvas.create_polygon(coords [0] *N+X, coords[1],
                      coords [2] *N+X, coords[3],
                      coords [4] *N+X, coords[5],
                      coords [6] *N+X, coords[7],
                      coords [8] *N+X, coords[9],
                      coords [10] *N+X, coords[11])

root.mainloop()